A blade guard is fitted to protect the operator.为保证操作人员的人身安全安装了桨叶保护罩。The RE - aluminizing technique and coating structure of gas turbine blade made of alloy M 38 G are studied.研究了涡轮叶片材料M38G合金渗稀土 - 铝涂层的工艺过程和组织结构.The matad...
因为在风和水的作用下,犁耕会导致土壤流失.Plowing can cause soil to be away by wind and water.第三个方法是最理想的, 将犁耕与栽种配合一起.Ideally , the third approach works best together with ploughing and planting.水田犁壁田间作业时由于土壤对犁壁的粘附,导致犁耕阻力增加,降低生产效率.Adhesive fo...